OpenAI Dev Day: Apps SDK, AgentKit, Codex GA, GPT‑5 Pro and Sora 2 APIs

**OpenAI** showcased major product launches at their DevDay including the **Apps SDK**, **AgentKit**, and **Codex** now generally available with SDK and enterprise features. They introduced new models such as **gpt-5-pro**, **gpt-realtime-mini-2025-10-06**, **gpt-audio-mini-2025-10-06**, **gpt-image-1-mini**, and **sora-2** with a pro variant. The Apps SDK enables embedding interactive apps inside ChatGPT with partners like **Canva**, **Figma**, **Zillow**, and **Coursera**. AgentKit offers a full stack for building and deploying production agents with tools like ChatKit and Guardrails. Codex supports speech and controller-driven coding, credited with high internal shipping velocity. Pricing for GPT-5 Pro was revealed at $15 input and $120 output per million tokens. *"OpenAI turned ChatGPT into an application platform"* and *"AgentKit built a working agent in under 8 minutes"* were highlights.